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Seven models are named in the court filings.

General Motors makes a lot of cars. It’s also got a huge number of brands tucked under its corporate umbrella, including Chevrolet, Cadillac, GMC and Buick. Usually, that means GM recalls can get pretty hefty, with multiple models that could share a faulty part getting pulled into a recall. That, of course, isn’t always the case, but sometimes it can happen.

If this new class-action suit leads to a recall, we might be looking at another. Seven GM models are covered in the suit, ranging from the Chevrolet Equinox to the GMC Terrain. A number of Buick models are named as well.

The suit was filed on April 12, 2022, by plaintiffs Melissa Kiriacopoulos, Craig Johnson, Beverly Trevethan, Sarah Burns, Geralyn Darr, Steve Fiene, and Thomas Graham. Given GM’s roots in Michigan, the filing was done through the US District Court for the Eastern District of Michigan.

Now- the meat of the suit. These are all the models named in the suit: 2010-2016 Buick Lacrosse (including Hybrid, eAssist), the 2011-2017 Buick Regal, 2012-2017 Buick Verano, 2010-2015 Chevrolet Captiva, 2010-2017 Chevrolet Equinox, 2013-2014 Chevrolet Malibu (including ECO, eAssist, Hybrid), and finally, the 2010-2017 GMC Terrain.

2016-2017 Chevrolet Equinox Front View DrivingChevrolet

2016-2017 Chevrolet Equinox Rear View DrivingChevrolet

2012-2017 Buick Regal GS Front View DrivingBuick

2012-2017 Buick Regal GS Rear View DrivingBuick

In short, the suit alleges that these GM vehicles, equipped with the brand’s 2.4-liter Ecotec four-cylinder engine, have faulty pressure control valves (PCV). Or rather, the issue is that the engines aren’t equipped with a traditional one, instead using a fixed vacuum port on the intake manifold. When clogged, crankcase pressure can cause these vehicles’ rear main seals to leak oil.

Left unchecked, the leak could eventually lead to engine failure. A GM bulletin sent to dealers in 2019 says that owners could experience the issue in sub-zero temps, or report a singular ‘pop’ noise before noticing an oil leak.

For now, progress on the lawsuit will be slow. A similar class-action suit over VW’s four-pot engine took years to resolve, with payments for damages only being made three years after the suit’s initial filing date.

2016-2017 GMC Terrain Forward VisionGMC

2016-2017 GMC Terrain Top ViewGMC

2013-2015 Chevrolet Malibu Sedan Front View DrivingChevrolet

2013-2015 Chevrolet Malibu Sedan Rear View DrivingChevrolet